<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>index</title>

    <style>
        *{
            margin: 0;
            padding: 0;
        }

        .container {
            width: 960px;
            height: auto;
            overflow: hidden;
            margin: 20px auto;
        }

        #str-input {
            width: 300px;
            height: 30px;
            border: 1px solid #000;
            background-color: ghostwhite;
            border-radius: 2px;
        }

        button {
            width: 60px;
            height: 30px;
            background-color: ghostwhite;
            border: 1px solid #000;
            border-radius: 2px;
            margin-left: 20px;
            cursor: pointer;
        }

        #display {
            width: auto;
            height: 512px;
            background-color: ghostwhite;
            overflow: hidden;
            border-radius: 3px;
            border: 1px solid #000;
            margin-top: 20px;
        }

        .tag {
            width: 50px;
            height: 50px;
            font-size: 15px;
            margin: 10px;
            background-color: orange;
            line-height: 50px;
            text-align: center;
            float: left;
        }

        .selected {
            width: 20px;
            height: 30px;
            background-color: darkturquoise;
        }
    </style>
</head>
<body>

<div class="container">
    <input type="text" id="str-input">
    <button id="insert">insert</button>
    <button id="search">search</button>

    <div id="display"></div>
</div>

<script src="task.js"></script>
</body>
</html>

</body>
</html>